作法：透過非 MEX 繫結擷取中繼資料

本主題說明如何透過非 MEX 繫結，擷取 MEX 端點的中繼資料。 此範例中的程式碼是以自訂安全中繼資料端點範例為基礎。

透過非 MEX 繫結擷取中繼資料

1. 判定 MEX 端點使用的繫結。 您可以藉由存取 Windows Communication Foundation (WCF) 服務的組態檔來判定服務的 MEX 繫結。 在此例中，MEX 繫結是定義於下列服務組態。

   <services>  
       <service name="Microsoft.ServiceModel.Samples.CalculatorService"  
               behaviorConfiguration="CalculatorServiceBehavior">  
        <!-- Use the base address provided by the host. -->  
        <endpoint address=""  
          binding="wsHttpBinding"  
          bindingConfiguration="Binding2"  
          contract="Microsoft.ServiceModel.Samples.ICalculator" />  
        <endpoint address="mex"  
          binding="wsHttpBinding"  
          bindingConfiguration="Binding1"  
          contract="IMetadataExchange" />  
        </service>  
    </services>  
    <bindings>  
      <wsHttpBinding>  
        <binding name="Binding1">  
          <security mode="Message">  
            <message clientCredentialType="Certificate" />  
          </security>  
        </binding>  
        <binding name="Binding2">  
          <reliableSession inactivityTimeout="00:01:00" enabled="true" />  
          <security mode="Message">  
            <message clientCredentialType="Certificate" />  
          </security>  
        </binding>  
      </wsHttpBinding>  
    </bindings>  
   

2. 在用戶端組態檔中，設定相同的自訂繫結。 在此用戶端也會定義 clientCredentials 行為以提供憑證，當要求 MEX 端點的中繼資料時可以用來驗證服務。 當使用 Svcutil.exe 透過自訂繫結要求中繼資料時，您應該將 MEX 端點組態新增至 Svcutil.exe 的組態檔 (Svcutil.exe.config)，並且端點組態的名稱應符合 MEX 端點位址的 URI 結構描述，如下列程式碼所示。

   <system.serviceModel>  
     <client>  
       <endpoint name="http"  
                 binding="wsHttpBinding"  
                 bindingConfiguration="Binding1"  
                 behaviorConfiguration="ClientCertificateBehavior"  
                 contract="IMetadataExchange" />  
     </client>  
     <bindings>  
       <wsHttpBinding>  
         <binding name="Binding1">  
           <security mode="Message">  
             <message clientCredentialType="Certificate"/>  
           </security>  
         </binding>  
       </wsHttpBinding>  
     </bindings>  
     <behaviors>  
       <endpointBehaviors>  
         <behavior name="ClientCertificateBehavior">  
           <clientCredentials>  
             <clientCertificate findValue="client.com" storeLocation="CurrentUser" storeName="My" x509FindType="FindBySubjectName" />  
             <serviceCertificate>  
               <authentication certificateValidationMode="PeerOrChainTrust" />  
             </serviceCertificate>  
           </clientCredentials>  
         </behavior>  
       </endpointBehaviors>  
     </behaviors>
   </system.serviceModel>  
   

3. 建立 MetadataExchangeClient 並呼叫 GetMetadata。 這有兩種做法：您可以在組態中指定自訂繫結，或是在程式碼中指定自訂繫結，如下列範例所示。

   // The custom binding is specified in configuration.  
   EndpointAddress mexAddress = new EndpointAddress("http://localhost:8000/ServiceModelSamples/Service/mex");  
   
   MetadataExchangeClient mexClient = new MetadataExchangeClient("http");  
   mexClient.ResolveMetadataReferences = true;  
   MetadataSet mexSet = mexClient.GetMetadata(mexAddress);  
   
   // The custom binding is specified in code.  
   // Specify the Metadata Exchange binding and its security mode.  
   WSHttpBinding mexBinding = new WSHttpBinding(SecurityMode.Message);  
   mexBinding.Security.Message.ClientCredentialType = MessageCredentialType.Certificate;  
   
   // Create a MetadataExchangeClient and set the certificate details.  
   MetadataExchangeClient mexClient = new MetadataExchangeClient(mexBinding);  
   mexClient.SoapCredentials.ClientCertificate.SetCertificate(  
       StoreLocation.CurrentUser, StoreName.My,  
       X509FindType.FindBySubjectName, "client.com");  
   mexClient.SoapCredentials.ServiceCertificate.Authentication.  
       CertificateValidationMode =  
       X509CertificateValidationMode.PeerOrChainTrust;  
   mexClient.SoapCredentials.ServiceCertificate.SetDefaultCertificate(  
       StoreLocation.CurrentUser, StoreName.TrustedPeople,  
       X509FindType.FindBySubjectName, "localhost");  
   MetadataExchangeClient mexClient2 = new MetadataExchangeClient(customBinding);  
   mexClient2.ResolveMetadataReferences = true;  
   MetadataSet mexSet2 = mexClient2.GetMetadata(mexAddress);  
   

4. 建立 WsdlImporter 並呼叫 ImportAllEndpoints，如下列程式碼所示。

   WsdlImporter importer = new WsdlImporter(mexSet);  
   ServiceEndpointCollection endpoints = importer.ImportAllEndpoints();  
   

5. 此時，您會擁有服務端點的集合。 如需匯入中繼資料的詳細資訊，請參閱操作說明：將中繼資料匯入服務端點。

另請參閱

• 中繼資料